6 
DYTISCUS. 
^423 inargiiialis, L. 
^424 circumcinctiis, Ahr. 
.425 circiimflexiis, Y. 
^426 lapponicns, Gyll. 
_^427 piinctulatus, F, 
_^428 dimidiatus, Berg. 
ACILIUS. 
_^429 canaliculatus, ISTic. 
_^430 sulcatiis, L. 
431 V. scoticiis, Stepli. 
HYDATICUS. 
^432 cinereus, L. 
-^433 transversalis, Berg. 
-1^434 seminiger, De G. 
Hybiieri, F. 
GYEINID-E. 
gyriyus. 
_I_435 miniitus, F. 
436 urinator, Ill. 
_^437 natator, Scop. 
438 Suffriani, Scrib. 
-^439 bicolor, Pk. 
440 distinctus, Aub. 
441 caspius, ]Men. 
442 colyinbus, Er. 
-1-443 mariims, Gyll. 
I 4 ^4 opacns), Sabi. 
ORECTOCHILUS. 
445 villosus, Midi. 
HYDROPHILID.®. 
hydrophilus. 
' 446 piceus, L. 
HYDROUS. 
447 caraboides, L. 
HYDROBIUS. 
448 fuscipes, L. 
449 oblongus, Hbst. 
HELOCHARES. 
450 lividus, Forst. 
451 punctatus, Sharp. . 
PHILHYDRUS. 
452 testaceus, F. 
453 maritimus, Tb. 
454 nigricans, Zett. 
455 nielanoceplialns, 01. 
456 marginellns, F. 
457 ovaUs, Tli. 
EYOCHRUS. 
458 bicolor, Pk. 
PARACYMUS. 
459 senens. Germ. 
AHAC.EYA. 
460 limbata, F. 
461 variabilis. Sharp. 
462 bipnstulata, Steph. 
LACCOBIUS. 
463 minntus, L. 
464 nigriceps, Th. 
BEROSUS. 
465 spinosus, Stev. 
466 signaticollis, Charp. 
aericeps. Curt. 
467 luridus, L. 
468 affinis, Brull. 
LIMNOBIUS. 
469 truncatellus, Thunb. 
470 papposus, Muls. 
471 nitidus. Marsh. 
472 picinus. Marsh. 
CH.ETARTHRIA. 
473 seminulum, Pk. 
SPERCHEUS. 
474 emarginatus, Schall. 
HELOPHORUS. 
475 rugosus, 01. 
476 nubilns, F. 
477 intermedins, Muls. 
478 aquations, L. 
479 Mulsanti, Rye. 
480 griseus, Hbst. 
481 granularis, L. 
482 teneipennis, Th. 
483 arvernicus, Muls. 
484 dorsahs. Marsh. 
485 nov. spec. 
486 nanus, Sturm. 
HYDROCHUS. 
487 brevis, Hbst. 
488 carinatus. Germ. 
489 elongatus, Schall. 
490 angustatus. Germ. 
OCHTHEBIUS. 
491 exscupltus. Germ. 
492 margipallens, Latr. 
493 Poweri, Rye. 
494 marinus, Pk. 
■ 495 pygm^us, F. 
496 bicolon. Germ. 
497 rufimarginatus, Steph. 
498 exaratus, INIuls. 
499 csneus, Steph. 
500 Eeratus, Steph. 
501 punctatus, Steph. 
HYDR.EUA. 
502 testacea. Curt. 
503 palustris, Er. 
504 riparia. Rug. 
505 angustata, Sturm. 
506 nigrita. Germ. 
507 gracilis. Germ. 
508 pulchella. Germ. 
509 atricaprlla, Wat. 
. 510 pygmsea, Wat. 
